Roby74

Hi, i have a w203, 2001. Today was raining and when i opened my trunk i noticed that the lining from the bottom part of the right side "pocket", behind the back wheel arch was wet. I pulled out the lining and i checked the walls around thinking that the water has to infiltrate from somewhere above. Nothing. I checked also the taillights and their mountings same result. The "pocket" was wet only on the very bottom, nowhere else.
Do you have any idea where this water is coming from?
I want also to mention that i am parking my car under a tree and the leaves have blocked the space between the car and the plastic trims located by the trunk drainage. Can this be the reason?
I have noticed this moisture after i drove my car in the rain, so i don't know if it was wet from before.
I never had this problem before, even in winters and heavy snow.
I am waiting for your answer.
Thank you in advance.

03MBC320

I've never had an issue with this nor heard of any... maybe there was some leaking water bottle or some liquid in your trunk? only time i've had fluids in my trunk is when a bottle (last one was armor all leather cleaner =( ) leaked open, that was fun to clean up. I'd say dry up all the water and wait for the next rainfall then check again, then you know for sure water's getting in.. then i'd guess check that all your weather stripping is in order.
have you been in any rear end accidents that your trunk may not be properly aligned?

contact148

dry it up put some white paper down and get your garden hose out start low and work your way up keep checking the paper before you move to a new area



are you sure it did not pour in when you opened the trunk?

bdgdl08

I want to say I saw a thread on this forever ago, but I didn't pay much attention. I agree with contact (on both parts). I've never had an issue, and it's definitely not common. Good luck!

EDC320

Check 2 things:
1: The sunroof drain hose - make sure it is not blocked or leaking.
2. Most likely the rear window needs to be resealed. I had the rear window removed and resealed. - Problem solved. Trunk has been dry for 3 years since.

Roby74

Thank you all. I will try to check all these. I have never been in an accident and until now I've never had any problems.

KkSaun

I noticed water in the small compartment directly behind the passenger side taillight. We had heavy rain for a few days, ironic for Southern Cali, I think thats when it happened. I didn't notice it until I reached in to grab my car duster and it was soaking wet.

peyo

it was also happened to my friend's car.

He went to dealer and checked. The problem was coming from the seal from rear windshield because of aging and due to heat from street parking.

You may want to check the upper lining from the trunk cover (the black plastic for draining system for upper trunk, when you open your trunk there is a black plastic panel between the body and rubber on the trunk. you can see it.)

hope it helps.

Roby74

Thank you for your answers.
Do you know how can I remove those plastic panels to check underneath them?
Are there any drainage holes?